NX Nastran DMAP Programmer's Guide - Kxcad.net

0 Use standard decomposition (default).
DECOMP
Matrix decomposition
If KSYM = 3, then CHOLSKY is set to the number of degrees of
freedom in the o-set.
MINDIAG Output-real double precision-default = 0.0D0. The norm of the
minimum diagonal term of [U].
DET Output-complex single precision-default=(0.0,0.0). The scaled value
of the determinant of [A]. See the POWER parameter. DET is not
applicable to sparse methods. See Remark 1.
POWER Output-integer-default=0. Integer POWER of 10 by which DET
should be multiplied to obtain the determinant of [A]. In other
words, the determinant of [A] is equal to DET*10 POWER . POWER is
not applicable to sparse methods. See Remark 1.
SING Output-integer-default=0. SING is set to -1 if [A] is singular. See
Remark 3.
NBRCHG Output (for symmetric decomposition only)-integer-default=0.
NBRCHG is the number of negative terms on the diagonal.
MAXRAT Output (for symmetric decomposition only)-real-default=0.0.
MAXRAT is the maximum value of the ratio of the matrix diagonal
to the factor diagonal.
DECOMP Input-integer-default=-1. Controls operation of module for
exceptional conditions as defined in the following table. If
DECOMP > 0 then DECOMP overrides the value specified on
NASTRAN SYSTEM(69) statement.
DECOMP Action
0 or -1 Print up to 50 messages for null columns and zero
diagonals (non-sparse method only).
1 Terminate execution when first null column is
encountered.
2 Suppress printing of message when a null column is
encountered (non-sparse method only).
4 Terminate execution when first zero diagonal term is
encountered.
8 Suppress printing of message when a zero diagonal
term is encountered (non-sparse method only).
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